<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./animation.css">
</head>

<body>
    <nav>
        <ul>
            <li>首页</li>
            <li>最新动态</li>
            <li>漫威宇宙
                <ol>
                    <li>电影</li>
                    <li>剧集</li>
                    <li>动漫</li>
                </ol>
            </li>
        </ul>
    </nav>
    <div class="box1"></div>


    <div class="box2">
        <div class="box3"></div>
    </div>

 

</body>

</html>